* update model save load

* first add

* update model save and load

* update train.py

* update LaneNet model saving and loading

* adapt slim to paddle-1.8

* update distillation save and load

* update nas model save and load

* update model load op

* update utils.py

* update load_model_utils.py

* update model saving and loading

* update copyright

* update palette.py

* update video download and infer

* update video_infer.py

* fix humanseg postprocess

* update visualdl

* updata optflow

* rm humanseg_server_quant